<?php $defaults = array(
  'theme_location'  => '',
  'menu'            => '', 
  'container'       => '', 
  'container_class' => '', 
  'container_id'    => '',
  'menu_class'      => '', 
  'menu_id'         => '',
  'echo'            => true,
  'fallback_cb'     => 'wp_page_menu',
  'before'          => '',
  'after'           => '',
  'link_before'     => '',
  'link_after'      => '',
  'items_wrap'      => '<ul id=\"%1$s\" class=\"%2$s\">%3$s</ul>',
  'depth'           => 0,
  'walker'          => '');
?>

<!-- begin navigation-->
<nav>
    <?php wp_nav_menu( $defaults ); ?> 
</nav>

<!-- end navigation-->
